A tropical-fruit crop specialist at UF’s Tropical Research & Education Center in Homestead, Jonathan Crane has studied how hurricanes affect Florida agriculture. His research covers damage to fruit crops and to grove infrastructure such as irrigation systems due to high winds and flooding.
Industry Expertise (2)
Agriculture and Farming
Areas of Expertise (2)
Hurricane Effects on Florida Agriculture
Biodiversity and the Environment
Rapid Structure-Based Annotation and Profiling of Dihydrochalcones in Star Fruit (Averrhoa carambola) Using UHPLC/Q-Orbitrap-MS and Molecular NetworkingJournal of Agricultural and Food Chemistry
Zhixin Wang, Jingwen Li, Alan Chambers, Jonathan Crane, Yu Wang
2020 Dihydrochalcones are a subclass of flavonoids. There has been growing interest in dihydrochalcones for their health benefits and potential to modulate flavor, but their comprehensive profile in diverse plant species is lacking. Star fruit is a tropical fruit rich in dihydrochalcones. In this study, a systematic annotation using UHPLC/Q-Orbitrap-MS and molecular networking was established to rapidly identify dihydrochalcones in 12 star fruit cultivars. A total of 53 dihydrochalcones were characterized within a short retention time including one novel compound (phloretin-3′-C-(2-O-trans-p-coumaroyl)-β-d-fucopyranoside) and 23 compounds identified from the Averrhoa genus for the first time. 3-Hydroxyphloretin was the most abundant dihydrochalcone in star fruit. All the identified dihydrochalcones had a higher abundance in leaves compared to fruits. This is the first report that systematically investigates dihydrochalcones in star fruit of multiple cultivars, and the results could provide a useful reference for the future development and utilization of plant genetic resources.
Bacterial Black Spot (BBS) of Mango in Florida1EDIS
Jonathan Crane, Romina Gazis
2020 South Florida has an estimated 1,351 acres of commercial mango production (Crane 2017). In addition, hundreds of thousands of mango trees are grown in home landscapes throughout central and south Florida (JH Crane, personal communication). Bacterial black spot (BBS), also known as bacterial canker, is caused by Xanthomonas axonopodis pv. mangiferaeindicae, most likely originating in India and spreading to other countries through the movement of contaminated plant material (Midha et al. 2012). BBS is a serious mango disease that may result in a 50% to 80% reduction in fruit production and therefore could become a limiting factor for the commercial production of some mango cultivars in Florida (Dayakar and Gnanamanickam 1995, Gagnevin and Pruvost 2001, Ploetz 2003). Moreover, even low disease severity (few lesions) on fruit can significantly reduce fruit quality and marketability. Many commercial mango cultivars are susceptible, but some are less affected by the disease than others (Cooke et al. 2009). There is little information available about how BBS affects mango cultivars in Florida and what the impact of this disease to the industry as a whole could be.
Regulations and Guidelines for ChemigationEDIS
Haimanote K Bayabil, Kati W Migliaccio, Jonathan H Crane, Teresa Olczyk, Qingren Wang
2020 Chemigation is a process where an irrigation system is used for transport and delivery of agrochemicals, generally fertilizers and pesticides, to a crop (Haman and Zazueta, 2017). Drip or micro-sprinkler irrigation systems are often used in chemigation. If the irrigation is properly plumed and chemigation properly implemented, chemigation can help growers reduce chemical usage and costs as it is applied using existing irrigation distribution infrastructure. However, the irrigation system must first be outfitted with properly designed injection and safety equipment. In addition, it is important that the irrigation system is built to allow the injection of chemicals or fertilizers at a known rate and that ensures application uniformity. Knowing the correct concentration of chemicals during chemigation is critical as some chemicals could potentially damage plants. Chemigation of chemicals/fertilizers at higher concentrations could also lead to leaching and contamination of freshwater bodies. The purpose of this document is to provide a brief overview of the regulations and some helpful tips for growers interested in chemigation.
Sample Profitability and Cost Estimates of Producing Sweet Flavored Carambola (Averrhoa carambola) in south Florida.: FE1079, 4/2020EDIS
Fredy H Ballen, Edward Evans, Jonathan Crane, Aditya Singh
2020 This 7-page fact sheet written by Fredy H. Ballen, Aditya Singh, Edward A. Evans, and Jonathan H. Crane and published by the UF/IFAS Food and Resource Economics Department reports the costs and returns of operating an established sweet-flavored carambola grove in south Florida. It is intended to provide a reference to help estimate the financial requirements of running an established grove. Information was collected through field interviews with growers and industry specialists about a wide range of production practices used on small farms of five acres or fewer.
ET-Based Irrigation Scheduling for Papaya (Carica papaya) in FloridaEDIS
Haimanote K Bayabil, Jonathan Crane, Kati W Migliaccio, Yuncong Li, Fredy Ballen
2020 Three irrigation scheduling methods (set schedule, ET-based, and tensiometer-based) were tested for papaya production in south Florida. ET-based irrigation scheduling was found to conserve water effectively. This 6-page document primarily focuses on the ET-based irrigation scheduling techniques for papaya under Florida conditions.